A well-defined supported metal catalyst : Ir4/MgO

S.D. Maloney, F.B.M. Zon, van, D.C. Koningsberger, B.C. Gates, M.J. Kelley

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

44 Citaten (Scopus)
85 Downloads (Pure)


[Ir4(CO)12] was used as a precursor for the prepn. of a MgO-supported catalyst with a uniquely simple metal structure, Ir4. The precursor was adsorbed on MgO from hexanes with the metal framework remaining intact, as detd. by EXAFS spectra. The surface-bound species was predominantly [HIr4(CO)11]-, which could be extd. from the surface by cation metathesis and identified in soln. by IR spectroscopy. After treatment of the MgO-supported Ir carbonyl in He followed by H2 at 300°, the sample was characterized again by EXAFS spectroscopy. The predominant surface species are clusters of 4 Ir atoms with an av. Ir-Ir distance of 2.69 .ANG..
Originele taal-2Engels
Pagina's (van-tot)161-168
TijdschriftCatalysis Letters
Nummer van het tijdschrift2
StatusGepubliceerd - 1990


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